Water-heater.



Patented May 30, 1911.

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III I PATENT @FTETQE.

ALFRED I-I. MERRILL, OF 'IQLEDO, OHIO.

WATER-HEATER.

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Specification of Letters Patent.

Patented May 30, 1911.

Application filed November 7, 1910. Serial No. 590,362.

To all whom it may concern:

Be it known that I, ALFRED H. IVTERRILL, a citizen of the United States, residing at Toledo, Lucas county, Ohio, have invented a new and useful Water-Heater, of which the following is a specification.

This invention relates to a heater for liquids.

This invention has utility when adapted to a water heater, especially water heaters adapted for residence warming.

Referring to the drawings: Figure 1 is an elevation with parts broken away, showing an embodiment of the invention as adapted to a water heater of the cast sectional vertical type; and Fig. 2 is an elevation of the heating or receiving chamber to be mounted between the heater and the flue.

The down pipe or return line 1 discharges its cold water from the radiator heating system into the lower part of the chamber 2, which chamber 2 has in its lower portion a discharge passage 3 leading to the lower portion of the heater proper 4. This water from the heater 4 as it is warmed rises and passes out through discharge passage 5 to the riser line in the heating circuit with the return line 1. From the upper part of the chamber 2 discharge passage 6 is in communication with the riser line 5.

In the lower part of the heater 4 is the burner or fire-pot 7, the products of combustion of which pass upward through flues 8 in the sections of the heater, and from thence into the flue portion 9 of the auxiliary or receiving chamber 2 in communication with the flue 10 for exhaust gases leading to the chimney or stack.

In normal operation the heater proper warms the cold water received from passage 3, which water growing lighter as it is warmed rises and passes out through discharge passage 5. In series with its down line 1 and supply passage 3 to the heater or first heating chamber 4t is the second heating or receiving chamber 2. Should there be any amount of heat in the exhaust gases after passing through the fiues 8 of the heater proper, this receiving chamber may take up such heat units and thus produce a rise in the temperature of the water from down line 1. The circulation in the heater 4L will draw this water through the line 3 to pass through the heater proper to I riser line 5. As heat units have been expended in chamber 2, there is accordingly less work for the heater proper and more efiicient operation of the plant is thus possible. In the event considerable heat is in the exhaust gases, some of the water in the chamber 2 may be sufliciently warmed to rise to the top of said chamber and have circulation momentum enough to go through the outlet passage 6 into the riser line 5 with the other hot water from the heater 4. This receiving chamber 2 is accordingly when supplying passage 3 in series with the down return line, and when supplying riser line 5 through passage 6 in parallel with the heater 4. The heat available in flue portion 9 from the exhaust gases, after passing the flues8 of the heaterd, determines which of these selective functions of the chamber 2 shall predominate, and there is accordingly an automatic control working toward a maximum of heat efficiency for the installation.

What is claimed and it is desired to secure by Letters Patent is:

1. The combination with a water heater provided with a first heating chamber, a riser line therefrom, a flue, a return line, of a second heating chamber between the first heating chamber and flue, said second chamber provided with a discharge passage ex tending to the heater and with an inlet opening near its base connected to the return line, said discharge passage extending to supply the lower portion of the first heating chamber from the upper portion of which first heating chamber the riser line extends.

2. The combination with a water heater provided with a first heating chamber, a riser line therefrom, a flue, of a second heating chamber between the first heating chamber and flue, said second chamber provided with a pair of discharge passages one of which extends to the lower portion of the first heating chamber, and from the upper portion of which first heating chamber the riser line extends.

3. The combination with a water heater provided with a first heating chamber having a return line, a riser line and a flue, of a second heating chamber connected to the riser line, said second heating chamber being between the first heating chamber and flue and in the return line.

4:. The combination with a water heater having a return line, and a riser line, of a heating chamber in the return line and provided with a line connection therefrom to the riser line from the heater.

5. The combination with a water heater having a flue, a return line and a riser line, of a heating chamber above the heater having a fine in communication with the water heater flue, said chamber having a connection near its base from the return line, a connection near its base extending to a lower portion of the heater, and a connection near its top extending to the riser line from the heater.

In testimony whereof I atfix my signature in the presence of two witnesses.

ALFRED H. MERRILL.

Witnesses C. H. RAUOH, GEO. E. KIRK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

